Which active pen for the Spectre x360?

[BethGr]

It should be an easy thing to do. Contact HP Sales with my computer information, order the accessory I would like to purchase. Turns out, not easy at all. So I'm asking here: does anyone know of an Active Pen that will work with the Spectre x360? I'm hesitant to order one via eBay if there's only a chance that it will work (HP Store and Amazon seem to be sold out.)

I contacted HP Sales. Not kidding, below is the transcript of the chat I had with a sales "consultant". To say that she is incompetent is an insult to incompetents. I can't find an email address for support to send this to, either.

10/13/2016
1/1
7:45 PM Connecting...
7:45 PM Connected. A support representative will be with you shortly.
7:45 PM Support session established with TANIYA.
7:45 PM TANIYA: Welcome to HP Customer Support for Notebook Support. My name is Taniya and I will be your technical support specialist
today.
NOTE: For security reasons, PLEASE DO NOT send credit card information via this chat window. If I need that information from you later, I will
link you to a separate, secure, HP web page to provide your credit card details.
7:46 PM Connecting...
7:46 PM Connected. A support representative will be with you shortly.
7:46 PM Support session established with TANIYA.
7:46 PM Elizabeth: Hello. I have a question about which Active Stylus to buy for a Spectre x360.
7:47 PM TANIYA: Okay
7:49 PM TANIYA: I am sending you links you can check them
7:49 PM TANIYA has sent a link: http://h30094.www3.hp.com/product/sku/11144407/mfg_partno/K8P73AA
7:50 PM TANIYA has sent a link: http://store.hp.com/webapp/wcs/stores/servlet/us/en/pdp/accessories883421/
hpactivepen
7:52 PM Elizabeth: OK, thanks. I'll try these.
7:53 PM TANIYA: Do you consider the issue to be resolved?
7:53 PM Elizabeth: Oh, wait. The one is sold out.
7:53 PM TANIYA: You can contact HP Shopping
7:53 PM TANIYA: for more details
7:53 PM Elizabeth: I got here through HP Shopping.
7:53 PM Elizabeth: And the other one says it is for tablets.
7:54 PM Printing chat transcript
7:57 PM TANIYA: Elizabeth where are you located?
7:58 PM Elizabeth: I'm in Germany today, but I live in Chicago.
7:59 PM TANIYA: Where did you purchase the product?
8:00 PM Elizabeth: Germany, because I need the German keyboard for work. But I'm going to order the pen from the US site because that's where I need it shipped.
8:01 PM TANIYA: You have reached the dedicated technical support department for USA/Canada. You need to contact HP support Uk
Website/Chat: http://www8.hp.com/in/en/contacthp/
support.html
8:02 PM Elizabeth: Why UK if I'm going to order from the USA?
8:02 PM TANIYA: You have purchased the product from Germany that's why
8:02 PM Elizabeth: And that link sends me to the Indian website.
8:03 PM Printing chat transcript
8:04 PM TANIYA: Sorry for that
8:04 PM TANIYA has sent a link: http://www8.hp.com/uk/en/contacthp/
phoneassist.
html
8:04 PM TANIYA: Check this link
8:04 PM Elizabeth: So I should talk to the UK site to order from the USA site? Sorry if I seem dense, but this is all very strange.
8:06 PM TANIYA has sent a link: http://www.hpshopping.in/
8:06 PM TANIYA: Order it from here
8:07 PM Elizabeth: Wait, what? From India? That makes zero sense.
8:08 PM Elizabeth: I've entered "active stylus" and "active pen" in the search box with zero results. (I wanted to see what shipping rates/times would be.)
8:12 PM TANIYA has sent a link: http://store.hp.com/?jumpid=re_r11662_redirect_ETR&ts=20161013181239_UNrgwotzXcku
8:15 PM Elizabeth: It opens a list of featured products and top sellers, none of which are an active pen.
8:15 PM TANIYA: You can also contact best buy
8:17 PM Elizabeth: That's helpful. Coming from the manufacturer with a web store. I'm usually patient with online chat support, but this has been an absolute waste of time.
8:17 PM Printing chat transcript